re: Women who are childless at the age of 30

95+ percent of my 3 kids friends were conceived by couples at like 29-30 and later. The ones born to younger parents all seem to have a pretty active grandparent in their life either financially or logistically. We're slightly upper middle class and I feel like it's becoming the norm. We weren't even ultra career oriented but didn't want to bring kids in the world with 90k in student loan debt which we paid off before buying a house/thinking about kids (I was 30 she was 28). My wife was 30, 32, and 35 when they were born and we were married for 5 years before trying.